One of the things that I like to do is to make homemade leaders.
To make homemade leaders you will need:
Cable or monofilament line (think 20# or 30# monofilament line).
All of those supplies are stored in the bottom of that tackle box.
Cut a section of cable about 16 – 18 inches long.
Slip a barrel over each end of the cable.
Insert one end of the cable through the eye of a hook.
Loop the cable back and insert the cable into the barrel.
Thread the cable through the barrel until about 1/8 in is sticking out the other end.
Use the crimping tool to crimp the barrel.
Repeat to the other end of the cable, but use a swivel.
Use a hook and swivel matching the size of fish you want to catch.
To add a weight to the leader, repeat the process, but attach a teardrop weight to the end of the cable.
If you want to be able to change the weight or hook out, attach a snap at the end of the cable. Make sure you use the type of snap that has a curved end so that the snap can not pull up easily. I made the mistake of buying some snaps where the retaining wire does not have a curl on it. If enough pressure is applied to the snap, it will pull open. For those types of snaps, I will only be attaching weights and not hooks.